barzel — iron

Genesis 4:22 — “As for Zillah, she bore Tubal-cain, who forged all implements of copper and iron. And the sister of Tubal-cain was Naamah.”

Leviticus 26:19 — “And I will break your proud glory. I will make your skies like iron and your earth like copper,”

Numbers 31:22 — “Gold and silver, copper, iron, tin, and lead—”

Numbers 35:16 — “Anyone, however, who strikes another with an iron object so that death results is a murderer; the murderer must be put to death.”

Deuteronomy 3:11 — “Only King Og of Bashan was left of the remaining Rephaim. His bedstead, an iron bedstead, is now in Rabbah of the Ammonites; it is nine cubits long and four cubits wide, by the standard cubit!”